<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../js/vue.js"></script>
</head>
<body>
    <div id="root">
        <h1>学生信息</h1>
        <button @click="student.age++">年龄+1岁</button> <br>
        <button @click="addSex">添加性别属性，默认值：男</button> <br>
        <button @click="addFriend">在列表首位添加一个朋友</button> <br>
        <button @click="updataFriName">修改第一个朋友的名字为：张三</button> <br>
        <button @click="addHobbies">添加一个爱好</button> <br>
        <button @click="updataHobbie">修改第一个爱好为：开车</button> <br>
        <h3>姓名：{{student.name}}</h3> <br>
        <h3>年龄：{{student.age}}</h3> <br>
        <h3 v-show="student.sex">性别：{{student.sex}}</h3> <br>
        <h3>爱好：</h3> <br>
        <ul>
            <li v-for="(p, index) in student.hobbies" :key="index">{{p}}</li>
        </ul>
        <h3>朋友们：</h3>
        <ul>
            <li v-for="(f, index) in student.friends" :key="index">{{f.name}}-{{f.age}}</li>
        </ul>
    </div>
    <script>
        Vue.config.productionTip = false;
        let vm = new Vue({
            el: '#root',
            data: {
                student:{
                    name:'tom', 
                    age:18,
                    hobbies:['抽烟', '喝酒', '烫头'],
                    friends:[{name:'jerry', age:35}, {name:'tony', age:36}],
                }
            },
            methods: {
                addSex(){
                    Vue.set(this.student, "sex", "男");
                },
                addFriend(){
                    this.student.friends.unshift({name:'老王', age:40});
                },
                updataFriName(){
                    this.student.friends[0].name = '张三';
                },
                addHobbies(){
                    this.student.hobbies.push("学习");
                },
                updataHobbie(){
                    this.$set(this.student.hobbies,0,"开车");
                }
            },
        });
    </script>
</body>
</html>